Feancis hebraist



(Nc Model.)

HEAT

RENAN, Jr.

ING FURNAGB.

Patented May 29, 1888.

lhvrrnn strates` PATENT FRANCIS HERNAN, JR., OF UTIGA, NEW' YORK.

HEATINGQFURNCE.

SPECIFICATION forming part ofLetters Patent No. 383,469, dated May 29,1888.

Application filed April 18, ISST.

To all whom it may concern.'

Be it known that l, FRANcIs KERNAN, J r., of Utica, in the county ofOneida and State of New York, have invented certain new and usefulImprovements in Heating-Furnaces; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had tothe accompanying dra-wings,and to the letters of reference marked thereon, which form part of thisspecification.

My invention relates to an improvement in heating-furnaces; and itconsists in the mechanism and construction herein pointed out andclaimed.

In the drawings presented, Figure l represents a plan View of myimproved furnace, the top of theouter shell or casing of the furnacebeing removed to better show its construction, that portion of Fig. llying on the left of line A A showing a plan view of the top of thecombustion chamber or dome, and that portion to the right ofline A Ashowing a transverse section of the same on line C G, Fig. 2. Fig. 2shows a vertical sectional view of my improved furnace on line B B, Fig.l.

Like figures of reference refer to like parts in the several viewspresented, and are so referred to in this specification.

My invention relates to that class of heating-furnaces having an annularliue or incased space surrounding the combustion or radiating dome ofthe furnace, and more particularly to the cellular partition ordiaphragm that forms one of the walls ofthe annular tlue and separatesit from the combustion-chamber proper of the furnace. It is ademonstrated fact that a solid plate or wall of metal having both of itssides exposed to the intense heat of the ordinary furnace is notdurable, and is impracticable as an element of furnace construction. Iaim to provide a cellular partition or wall that shall have all theadvantages and functions of a continuous solid partition or wall, withthe added advantage of being so 'constructed as to admit of acirculation of air 5o to utilize the air which becomes heated by itspassage through the cellular wall or partition Serial No. 235,236. (Nomodel.)

in augmenting the volume of heated air discharged by the furnace.

Referring more specifically to the drawings, l, Figs, l and 2,represents the outer wall or shell of the combustion chamber or dome ofan ordinary furnace. 2, Figs. l and 2, represents the top or cover plateof same; and 3, Figs. l and 2, represents a portion of the upper part ofthe ire-pot, the remainder being broken away.

4, Figs. 1 and 2, represents the coneshaped bottom plate of thecombustion chamber or dome.

5, Figs. l and 2, represents the tubes forming the cellular wall orpartition hcreinbefore referred to. These tubes are preferably circularin form, but might be square, elliptical, or polygonal and answer thesame purpose.,

6, Fig. l, represents the charging door or nozzle of the furnace; and 7,Figs. I and 2, represents the ordinary smoke exit or collar.

9, Figs. l and 2, represents the outer shell or casing of the furnaceproper.

It will be observed that the ends of tubes 5 are inserted in or attachedto the opposing top and bottom plates of the furnace in such a mannerthat air has an unobstructed passage through them, and that the greaterportion of them are placed in as close proximity to each other as thedetails of practical mechanical construction will admit of. For a shortdistance on each side of the charging-door I separate the tubesslightly, so as to allow the passage of the products of combustionbetween them, as shown at 8 8 8, Fig. l. The purpose of thisconstruction is to allow greater space for the products of combustionand prevent their puffing or blowing out upon the opening of thechargingdoor. I do not, however, limit myself to this specificconstruction, as in the use of some kinds of fuel such arrangement wouldnot be necessary. I also preferably locate smoke-exit 7 at or near thebottom of the annular flue or space formed between cellular wall orpartition and outer shell ofcombustionchamber, as such location counteracts the tendency of the products of combustion to rise and effectsa better distribution of saine in the annular flue.

The action of my device is as follows: Fire being kindled in the repot,the products of ICC combustion rise therefrom and,separating,pass intothe annular flue or space 17, Figs. 1 and 2, between cellular partitionor wall and shell of combustion-chamber, imparting their heat theretoand passing off through the smokeexit 7, their course being indicated byarrows 10, Fig. 1. Air is admitted into the space between outer shell 1of combustion-chamber and outer shell9 of furnace, and,becoming heatedby contact therewith, is carried off in any desired direetion throughhot-air pipes 11 11, Fig. 2. The course of the heated air is indicatedby arrows 12 in Fig. 2. I preferably construct plate 4, Figs. 1 and 2,of inverted conical form, as such conformation does not afford alodgment for the dust or ashes arising from the fire.

Reference to Fig. 2 will show that I provide the top and bottom plate ofboth furnace and combustion-chamber with projecting flanges, inside ofwhich I place the vertical walls or sides of the same, as shown at 1313, Fig. 2. As a detail of mechanical construction such arrangement isvaluable, as it affords better fa cilities for retaining the packingmaterial used in the joints than when the vertical walls or sides areplaced outside the flanges. For securing the bottom and top plates ofthe combustion-chamber to its sides, I use knees 14, Fig. 2, attached tothe side walls and opposed by ears 15, Figs. 1 and 2, which are attachedto or a part of the plate. These are properly perforated for thereception of bolt 16, Figs. 1 and 2, which are used for clamping theparts together. The shape of the knees renders them slightly elastic andaffords coml pensation for slight change and dimension due to variationsoftemperature. Reference to Fig. 2 will show that the upper portion orradiating drum of my furnace is of larger diameter than that portionsurrounding the lire-pot. This necessarily furnishes a greater amount ofradiatingsurface than would be the case were the entire outer casingconstructed of the same size as that portion surrounding the fire-pot.

It is evident that various changes could be made in the construction ofmy device without departure from the central feature or spirit thereof;hence I do not limit or confine myself to the precise specificconstruction described herein.

What I claim as new, and desire to secure by Letters Iatent, is*

The combination,with thecombustiomdome, 0f larger diameter than thefire-pot immediately above the' same, of a circularl cellular partitionformed of vertical air-tubes passing through the doine,formingacombustion-chamber within the dome, and a circular flue between thepartition and the wall ofthe dome, the air-tubes having spaces betweenthem in front and adjacent to the chargingdoor, and the remainder beingso nearly in contact as to form a partition in front of and adjacent tothe smoke-exit, as described.

In witness whereof I have affixed my signature in presence of twowitnesses.

FRANCIS KERNAN, J R.

Witnesses:

EDWIN H. RIsLnY, W. G. STONE.

